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New Borylene Complexes of the Type [μ‐BX{. 5 ‐C 5 H 4 Me)MN(CO) 2 } 2 ]: Substitution Reactions at the Metal‐Coordinated Borylene Moiety
Author(s) -
Braunschweig Holget,
Müller Matthias
Publication year - 1997
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19971300918
Subject(s) - chemistry , manganese , moiety , reagent , nuclear magnetic resonance spectroscopy , metal , medicinal chemistry , crystal structure , substitution reaction , yield (engineering) , single crystal , stereochemistry , crystallography , organic chemistry , materials science , metallurgy
The reaction of the air‐ and water‐stable borylene complex [μ‐BNMe 2 {. 5 ‐C 5 H 4 Me)Mn(CO) 2 } 2 ] ( 1a ) with a solution of Hcl in Et 2 O affords the correspondin chloroborylene complex [μ‐Chloroborylenebis{dicarbonyl(. 5 ‐methylcyclopentadienyl)manganese}(Mn–Mn)] ( 2 ). This compound easily undergoes further substitution reactions with protic reagents such as primary amines, alcohols and water at the metal coordinated borylene moiety with elimination of HCl, giving new products of the type [μ‐BX{. 4 ‐C 5 H 4 ME)Mn(CO) 2 } 2 ] ( 3a , ab : X=NH t Bu, NHPh; 4a, b : × = OMe, OEt; 5 : X= Oh}. All borylene complexes were isolated as crystalline solids in good yield and characterized by multinuclear NMR methods and IR spectroscopy in solution. In addition, the structure of 4b in the crystalline state was determined by a single‐crystal X‐ray study.